code: def test_fast(self):
      self.samples = [sample_n_k(self.n, self.k) for _ in range(200)]
      self.subtest_constraints()
  
file_path: pfrl/tests/utils_tests/test_random.py
imports: import timeit
  import unittest
  import numpy
  import pytest
  from scipy import stats
  from pfrl.utils.random import sample_n_k
label_desc: Use image node_id 2 for calling the TestSampleNK obj's underlying member method code with example usage: obj.test_fast() without return types